Detachable book-cover.



PATENTED DEC. 18, 1906.

P. MEISSNER. DETAGHABLE BOOK GOVER- APPLICATION FILED APE-3,1906.

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UNITED STATES PATENT OFFICE.

PAUL MEISSNER, OF BERLIN, GERMANY, ASSIGN OR TO AUGUST SUHERL, OF BERLIN, GERMANY.

DETACHABLE BOOK-COVER.

Patented Dec. 18,1906.

Application filed April 3, 1906. Serial No. 309,600.

To all whom it may concern:

Be it known that I, PAUL MEISSNER, physician, a subject of the King of Prussia, German Emperor, residing in Berlin, Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Detachable Book-Covers, of which the following is a specification.

This invention has reference to a detachable cover for books, and it is so arranged that the said cover may be detached from the book itself by a simple manipulation. This rapid detaching of the cover from the book is made possible by securing to the back of the properly-stitched book a T-shaped hook or the like in a suitable manner, which is insert' ed into a suitably-shaped slot in the back of the cover and which after imparting to the book a turn toward the cover securely connects the two parts with each other. Any accidental detaching of the-cover is prevented in a suitable manner, as hereinafter described.

In the accompanying drawings, Figure 1 shows an inside view of the cover when open. Fig. 2 is a section on the line A B of Fig. 1. Fig. 3 shows the back of the book to be secured in the cover. Fig. 4 shows said book in side elevation. Fig. 5 is a top view of the cover with the book inserted and with the sides of the cover turned back.

Upon the back a of the stitched or sewed book 1) the T-shaped hook c is immovably attached in a suitable manner. The head of the said hook is parallel to the longitudinal extension of the back of the book. Upon the correspondingly stiff inside face (i of the back of the cover e a slot f is provided, the peculiar shape of which is shown in Fig. l. The said slot f extends at right angles to the longitudinal extension of the inside face (Z of the back of the cover 6. WVhen it is desired to mount the book in the cover, the hook c is inserted in the slot f, the longitudinal extension of the book then assuming the position indicated by the line C D of Fig. 1. Then the book or the cover, respectively, is turned through ninety degrees, so that the back a of the book I) will coincide with the inside face of the back of the cover.

In order to prevent the book from becoming turned in relation to the cover and possibly from becoming detached from the latter when the cover is turned to the side for the purpose of opening the book or upon looking through the book cursorily, a bulged projection or boss 9 is secured to the back a of the book in alinement with the catch, which boss when the book is inserted in the cover a enters into a corresponding imperforate socket h of the inside face (Z by spring action. Instead of one boss 9 a number of such bosses may be provided on the back a of the book, and there may then be also arranged a correspondingly larger number of sockets h at the inside (1 of the back of the cover. In the case of several bosses and sockets being provided they are preferably arranged at either side of the locking device 0 f. The bosses g are here shown of somewhat semiglobular shape. They may, however, also be made of pyramidal or any other shape. The shape of the sockets h is made to fit the particular shape of the boss g.

The above-mentioned hook or button 0 may of course also be secured to the inside of the back of the cover, and the slot f should then be arranged in the back of the stitched book. In the same manner the boss g and the sockets it may change places on the parts to be connected, as above described.

What I claim, and desire to secure by Letters Patent of the United States, is-

A book provided with an immovable catch having a head extending longitudinally along its back, and with a bulged projection in alinement with said head, combined with a cover having a transversely-extending slot through which the catch is adapted to be passed,- and with an imperforate socket adapted to receive the projection, substantially as specified.

In witness whereof I have hereunto signed. my name in the presence of two subscribing witnesses.

PAUL MEISSNER.

WVitnesses:

HENRY HAsPER, WOLDEMAR HAUPT. 

